Method for generating electronic signatures

Abstract

The method for forming a forgery-proof electronic signature is based on the fact that from data with a specific body feature of the signature-authorised person are combined with data which indicate the presence of the signature-authorised person. From this combination, one forms an electronic signature. Data, which indicate the precence are for example body-heat data or body sound. The forgery-proof electronic signature makes a secure data transfer possible.

1 . A method for forming a forgery-proof electronic signature, characterised in that from data (F) with a specific body feature of the signature-authorised person as well as data (W) which indicate the presence of the signature-authorised person, one forms a data combination (u), said data combination embodying the corresponding electronic signature.  
     
     
         2 . A method according to  claim 1 , characterised in that for forming the data combination (u) one uses additional data (C) for an identification code.  
     
     
         3 . A method according to  claim 2 , characterised in that the data for the identification code (C) contain an alphanumeric series of characters.  
     
     
         4 . A method according to one of the preceding claims, characterised in that the data (F) with the specific body feature are those of a fingerprint and that the data (W) for the presence of a signature-authorised person originate at least partly from the body heat of his fingerprint.  
     
     
         5 . A method according to one of the preceding claims, characterised in that the data (W) for the presence of a signature-authorised person originate at least partly from the body sound of his finger.  
     
     
         6 . A method according to one of the  claims 1  to  3 , characterised in that the data (F) with the specific body feature are those of the eye iris and that the data (W) for the presence of a signature-authorised person originate from the pupil tremors of his eye.  
     
     
         7 . A method according to one of the preceding claims, characterised in that the data (F) for the specific body feature and the data (W) for the presence of a signature-authorised person are sequentially read into a memory and this complete sequence is used as an electronic signature.  
     
     
         8 . A method according to  claim 2  or  3 , characterised in that the data for the identification code (C) and the data (F) for the specific body feature and the data (W) for the presence of a signature-authorised person are read into a memory sequentially in a manner such that the sequence parts are stringed together according to random principle and the complete sequence is used as an electronic signature.  
     
     
         9 . A device for setting up a forgery-proof electronic signature with the involvement of biometric data, characterised by a first means (F) which registers a body feature and prepares data from this and a second means (W) which registers the presence of a person from which one has recorded the body feature and a third means (CTR) which controls the output of information of the first two means, and a memory for recording and outputting the data from the information stored in a controlled manner.  
     
     
         10 . A device according to  claim 9 , characterised by means (C) for preparing an alphanumeric code.  
     
     
         11 . A device according to  claim 9  or  10 , characterised in that to the second means (W) which indicate the presence of a person from whom the body feature has been recorded one connects one or more means (A1, A2, A3) specifying the signals and/or the data, and the signals at the output of this or these are grouped together into a data sequence.  
     
     
         12 . A device according to  claim 9 , characterised in that the first means comprises a row of thermal sensors ( 1 ) for recording a thermal fingerprint as well as evaluation means ( 3 ), and that the second means comprises a microphone.  
     
     
         13 . A device according to  claim 12 , characterised in that the second means additionally comprises processor means for determining a Fourier spectrum of pulse sounds.  
     
     
         14 . A method for transferring data between a client (X) and a contractor (Y) with the help of a communication connection, characterised by the following steps: 
 a) creating a first connection between the client and a central certification location ( 31 )    b) determining body-specific data (F) and data which characterise (W) the presence of the client (X),    c) forming a data combination (u) as an electronic signature,    d) transferring this data combination (u) to the central certification location via the first connection    e) verifying the identity of the client by the central certification location by way of the data combination (u)    f) creating a second connection between the central certification location ( 31 ) and the contractor (X)    g) creating a third connection between the client and the contractor, and cancelling the first and second connection    h) data exchange between the client and the contractor via the third connection.    
     
     
         15 . A method according to  claim 14 , characterised in that simultaneously to step g) or after step g) one creates a verification data set which contains an identification of the client, for example the data combination (u) as his electronic signature, as well as an identification of an access-authorised person of the contractor, for the electronic signature of this.  
     
     
         16 . A method according to  claim 14  or  15 , characterised in that in step d) additionally a code identifying the means for determining the body-specific data (F) and/or the means for determining the data (W) characterising the presence is transmitted.  
     
     
         17 . A method according to one of the  claims 14  to  16 , characterised in that the data in step d) is transmitted in an encrypted manner, wherein one uses a time-dependent key.